Grinding mill



R. P. JUGEL GRINDING MILL Feb. 21, 1933.

Filed March 51, 1930 All INVENTOR. 14716 A TTORNEYS.

Patented Feb. 21, 1933 warren STATES PATENT OFFICE.

RUDOLF IP. JUGEL, OF DENVER, COLORADO, ASSIGNOR T AMERICAN BALL MILL COMPANY GRINDING MILL Application filed. March 31, 1930. Serial No. 440,404.

My invention relates to grinding mills, and particularly to lining sections for shells thereof. The mill heads and the construction and arrangement of other parts shown in the present drawing are described more in detail and claimed in my co-pending application Serial No. 440,403 filed March 31, 1930. I

An object of the invention is to provide lining sections for a grinding mill that are individually removable without disturbing the other sections.

A further object is to provide a lining of the character mentioned, the sections of which are held in place without the use of bolts or nuts.

Another object of the invention is to increase tne strength of the shell without increasing the amount or changing the kind of material therein and yet provide a shell suitable for the lining hereinabove referred to.

It is to be understood that my grinding mill is suitable for use with any grinding medium, whether balls, rods or pebbles.

Novel details of construction and novel combinations and arrangements of parts will appear in the course of the following description. In the drawing, like reference characters designate similar parts in the several views.

Figure 1 is an elevation, partly in section, of grinding mill containing an embodiment of the invention.

Figure 2 is a enlarged, broken section taken on the line 22 of Figure 1.

Figure 3 is a broken section taken on the line 8-3 of Figure 2.

Figure 4 is a broken section taken on the line 4-4 of Figure 2.

Figure 5 is a plan view of the rear surface of a lining section.

Referring more in detail to the drawing, the reference numeral 6 designates standards for the support of the mill.

The mill comprises a shell 7 having heads 8 and 9. The heads have integral trunnions 10 and 12 respectively of reduced diameter. Liners 18 and 14 are supported in the trunnions 10 and 12 respectively. The liner 13 50 has an internal screw 15 for feeding material posite side of the channel 21, when the sections to the interior of the shell 7. A scoop, partly shown at 16, feeds material to the inlet trunnion 10. v The trunnions are mounted for rotary support in bearings 17 on the standards.

A spout 18 on the outlet trunnion 12 communicates with bore 18 of the liner 14 for the discharge of material; 7 V

Since per se the elements mentioned in the preceding paragraph, with the exceptionof the shell 7, form no part of the present invention, they will not be described in further detail.

The heads 8 and 9 have sectional liners composed of sections 19 and 20, the latter being slotted or otherwise apertured to provide grates,all of which are described more in detail in my application of the above-mentioned serial number. i

The shell has channels 21'provided by external, longitudinal ribs22. These ribs are alsouseful in strengthening the shell without increasing the amount or changing the kind of material. Flanges 28 on the heads are bolted to flanges 24 at the endsof the shell. Bolts 25 are also used to fasten in placea gear 27 by means of its web 26. V

A sectional lining is provided for the shell,

a section of which is shown at 28 in Figure 5. Each liner section has spaced lugs 29 at one edge, which are comparatively short in length. Along the opposite edge of the same ,face of the liner is a somewhat longer lug 30, corresponding in length and-position to the space between-the lugs 29.

The face of the liner section, oppositeto that carrying the lugsQhasa ridge or rib 31, which strengthens the section and assists in lifting material during rotation of the mill.

The liner sections are arranged in longitudinal alinementin the shell, with theirlugs in the channels 21 The lugs, however, do not fill the channels,.but leave spaces between adjacent sections. Blocks or fillers 32 of wood or other compressible and/or expansible materiahare placed flat in the channels for 'fas- 5 tening the sections in place. These blocks are approximately the length of the space between lugs29 on thesameliner section, the width of the space betweenlug 30 and theop-f are in position, and the thickness of the projecting length of the lugs.

Filler blocks 33 also of wood or other compressible and/or expansible material provide wedges or fillers between the series of alined sections to hold same in position. The blocks 32 are flat in the channels between the lugs and the opposite sides of the channels and between the lugs 29 of the adjacent section, as best shown in Figure 3. The blocks 33 are placed or driven in the spaces between the series of sections and abut against the blocks 32.

The grate sections 20 have slots 34 that connect with passages 35 formed by flanges 36 on the grate sections. The passages 35 are connected with the bore 18 by transverse bores 37 that pour material on to a cone 38.

In the use of the invention, material is fed into the mill by the scoop 16. The screw 15 then carries the material into the shell, where it is pulverized by balls, rods or pebbles in the well-known manner. The pulverized material moves through the slots 34, into the pas sages 35, through the transverse bores 37, on

' to the cone 38, through the bore 18, and then is discharged by the spout 18.

When removing a section, the bordering wedges 33 on either side are removed. The section is then removed and replaced by another without disturbing the other sections in the shell. The sections fit snugly around the portions of the shell between the channels and the lugs of the sections project into the channels. The blocks 32 in the channels are arranged between lugs 29 of one section, and between lug 30 of the adjacent section and the opposite wall of the channel.

Then wedge blocks 33 are placed between the sections to abut against the adjacent blocks 32. Continued operation of the mill tightens the liners, as the hammering effect of the falling material and grinding medium wedge the blocks 33 tighter.

Changes may be made in the details of construction and arrangement without departing from the spirit of the invention.

What I claim and desire to secure by Letters Patent is:

1. A grinding mill comprising a channeled shell, a sectional lining for the shell, sections of the lining having lugs in the channels, and

fillers between the lugs and walls of the channels, holding the lugs'in the channels.

2. A grinding mill comprising a channeled shell, a sectional lining for the shell, sections of the lining having lugs in the channels, ad-

jacent sections having spaced lugs and lugs opposite the spaces, andfillers between the spaced lugs, engaging walls of the channels and the otherlugs.

3. A grinding mill comprising a channeled A shell, a sectional lining for the shell, sections of the lining having lugs in the channels, adjacent sections having spaced lugs and lugs opposite the spaces, fillers between the spaced lugs engaging walls of the channels and the other lugs, and secondary fillers between adj acent sections.

4. A grinding mill comprising a channeled shell, a sectional lining for the shell, sections of the lining having lugs in the channels, adjacent sections having spaced lugs and lugs opposite the spaces, fillers in the channels between the spaced lugs, engaging walls of the channels and the other lugs, and secondary fillers outside the channels, between adjacent sections.

5. A grinding mill comprising a channeled shell, a sectional lining for the shell, sections of the lining having lugs in the channels, adjacent sections having comparatively short, spaced lugs and having comparatively long lugs opposite each others spaces, and fillers between the spaced lugs, the long lugs and the channel walls, holding the sections in place.

6. A grinding mill comprising a channeled shell, a lining having sections alined in rows at opposite sides of the channels, opposite sections of the rows having spaced lugs and lugs opposite the spaces respectively, and fillers in the channels between the spaced lugs, the other lugs and the walls of the channel.

In testimony whereof I hereunto aflix my signature.

RUDOLF P. J UGEL. 

